Add installation-procedure for SUSE Enterprise Linux/SLES

[tectumopticum]

I'm missing a instruction for installing chrome on SLES-systems
Probably these steps are sufficient for an installation on a SLES-server using zypper as root (otherwise add sudo):
zypper addrepo http://dl.google.com/linux/chrome/rpm/stable/x86_64 Google-Chrome
zypper refresh
wget https://dl.google.com/linux/linux_signing_key.pub
rpm --import linux_signing_key.pub
zypper in libSPIRV-Tools-suse4-2017.0.g103-lp151.3.4.x86_64.rpm
zypper in libvulkan1-1.0.65.0-lp151.4.4.x86_64.rpm (not sure if this is the correct one and didn't know where to retrieve the gpg-keys), ignore the dependencies
zypper in vulkan-1.0.65.0-lp151.4.4.x86_64.rpm
zypper install --no-confirm google-chrome-stable